Compound Microscope Questions?

Question

1) What changes in the brightness of the fieldwhen you change from the lowest power
objective to higher power objectives.

2) How does the depth of focus change when you switch to a highpower objective from a low poer objective.

3) What is the maximum magnification achievable with yourdissecting microscope? Would you
expect to be able to see cheek cells with a dissectingmicroscope? 1) What changes in the brightness of the fieldwhen you change from the lowest power
objective to higher power objectives.

2) How does the depth of focus change when you switch to a highpower objective from a low poer objective.

3) What is the maximum magnification achievable with yourdissecting microscope? Would you
expect to be able to see cheek cells with a dissectingmicroscope?

Explanation / Answer

1) What changes in the brightness of the field when you change fromthe lowest power objective to higher power objectives. The higher the power of magnification, the DIMMER the field ofview. you will need to maximize brightness of the light source andregulate the diaphragm. 2) How does the depth of focus change when you switch to a highpower objective from a low power objective. You must adjust the depth of focus with the small, fine focusingknob. 3) What is the maximum magnification achievable with yourdissecting microscope? Would you expect to be ableto/qa-board/message-add.aspx?message_topic_id=760196 see cheekcells with a dissecting microscope? In order to find the maximum magnification multiply the eye piecemagnification with the power objective used. "ind the magnification imprinted on the ring around the ocularlens--it is probably 10x. Then find the magnification imprinted onthe objective lens that you are using--it is probably either 4x,10x, or 40x. Multiply the magnification of the ocular lenstimes that of the objective lens; this is thetotal magnification that you see."http://faculty.baruch.cuny.edu/jwahlert/bio1003/microscope.html The dissecting microscope has arelatively low magnification. "The dissecting microscope isconfigured to allow low magnification of three-dimensional objects-objects larger or thicker than the compound microscope canaccommodate. "http://abacus.bates.edu/~ganderso/biology/resources/diss_scope.html

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